Research And Development Of Visible Power Flow Calculation Software Of Distribution Networks

DMS (Distribution Management System) is an integrated comprehensive automation system which accord with the development of moden distribution system. The DMS include all of the following function, DA (Distribution Automation), GIS (Geographical Information System), DJM(Distribution Job Management), D-PAS(Distribution Powerful Application Software), TCM(Trouble Call Management), SM(Service Management), ET (Electric Energy Tariffing), LM (Load Management), etc. The fundamental component of DMS is networks analysising. The distribution software centered network analysis is divided into two components: basic software and derived software. The basic software consists of topology analysis, on-line load flow computation, state estimator, security analysis, dispatchers training simulator, short circuit current computation, and voltage/ reactive power optimize, etc. The derived softwares consist of load control, capacitor optimizer configuration, transformer and feeder load distribution, impedance computation of generator, etc. Network analysis software is powerful dispatch tool, though witch the current state of the power system can be realize, then improve the security and economic potential. The paper presents a distribution analysis software platform which is developed combining computer graphical theory and OOP (Object-Oriented Programming). The platform includes three modules, the graphics module, the database module and the computation module. The graphical module can draw the key diagram of power system; the database module can save, browse and edit the data of power systems; the computation module can compute the power flow. The whole system is designed under the OOP ideology. The three modules integrate into a whole system, all the data of distribution systems can be input, management and compute through the -graphical interface. The system also is a open system, that is to say other modules can easily add into the system in the near future, however the existing codes hardly need modify. The paper chooses the alternate iterate algorithm after made a compare with all kinds of power flow computation algorithms. The results of the two examples indicate that theplatform is efficient and accurate. As an essential component of DMS, the system will supplement itself in the following aspect, short circuit current calculation, theoretical losing, voltage/reactive power optimize, state estimation, load forecast, etc.